Hinge-mortising machine.



No. 768,058. PATBNTED AUG. 23, 1904.

E J. A. MACKENZIE.

HINGE MORTISING MACHINE.

APPLICATION FILED AUG. 15, 1906.

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No. 768,058. PATENTED AUG. 23, 1904.

J- A MACKENZIE. HINGE MORTISING MACHINE.

APPLICATION FILED AUG. 15, 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

N/T/YEJJEJ q I ///J AUTO/"V575 UNITED STATES Patented August 23, 1904.

PATENT OFFICE.

HINGE-MORTISING MACHINE.

. SPECIFICATION forming part of Letters Patent No. 768,058, dated August23, 1904.

I Application filed August 15, 1903. Serial No. 169,578. (No model.)

To all whom it may concern.-

Be it known that I, J AMES A. MACKENZIE, a citizen of the United States,residing at Min neapolis, county of Hennepin, State of Minnesota, haveinvented certain new and useful Improvements in Hinge-MortisingMachines, of which the following is a specification.

This invention relatesto the class of machines or tools designed forcutting mortises extending in from the edge of a wooden piece to receivethe leaves of hinges.

The object of my present invention isto provide a tool that can bereadily adapted or adjusted to form mortises of different length.

A further object is to provide means for operating the horizontalcutting-knife.

Other objects of the invention will appear from the followingdetaileddescription.

The invention consists generally in various constructions andcombinations, all as hereinafter described, andparticularly pointed outin the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a side elevation, partially in section, of a hinged mortising-toolembodying 'my'invention. Fig. 2 is a section on the line as :13 ofFig. 1. Fig. 3 is a section on the line 1 1 of Fig. 2. Fig. 4: is adetail section on the line a z of Fig. 2, showing the gear in positionto operate the horizontal-sliding knife; and Fig. 5 is asimilar viewshowing the gear raised to release the stock of the tool provided with asuitable handle 3.

i is a clamp-block for securing the normally fixed knife 5 in position,the depth of the cut of said knife being regulated by the adjustableplate 6. Several of these knives with cutting edges of different lengthare provided to suit the distance between the side knives.

7 is a post mounted in the stock or head, upon which the blow is struckwith a hammer to force the fixed knife into the wood.

8 represents a pin mounted in the base of the tool and having a hole inits upper end to receive an oscillating lever 9, said holebeing ofsufficient size to permit the free vertical movement of the ends of saidlever, and the pin 8 forms a fulcrum therefor. The ends of the lever 9are adapted to enter holes 10 in vertically-slidable knives that areadapted to cut across the grain of the wood and form the ends of themortise. These knives are preferably provided with a plurality of holesto permit their vertical adjustment upon the lever 9.

To'adapt the tool for forming mortises of different length, I provide aseries of vertical guideways 12 in the stock, in which the knives 11 areslidable, and these guideways permit the said knives to be adjustedtoward or from each other, according to the length of the mortise thatit is desired to cut. The lever 9 is made of suflicient length toallow'the adjustment oftheknives 11.

13 represents a foot-piece or bracket projecting horizontally from-thestock and supporting a horizontally-sliding knife, as hereinafterdescribed.

14 represents gage-arms having slotted ends that are secured to thebracket 13 by screws 15.

16 represents horizontally-adjustable pins mounted on the bracket 13 andarranged to engagethe wood and regulate the width of the cut therein.

The bracket 13 is provided with a guideway 17 for ahorizontally-arranged knife-18, that operates substantially at rightangles to the knives 5 and 11 to cut out'the chip and complete themortise. The inward movement of this knife 18 is regulated "by stops19,..which prevent it from coming in contact with the fixed knife 5, anda rack-bar 2O is centrally arranged on said knife 18 in positiori'to been gaged by the teeth of a gear 21, provided on a lever 22, thatoscillates on a pin 23, mounted in bearings in brackets 24:. When not inuse, the lever 22 drops into a slot 25 in the post 7; but when liftedout of the said slot and moved engagement of the knife 18 from its gear,and I therefore provide the pin 23 with flattened ends 26, that areadapted when turned to a certain point to enter notches 27, provided inthe brackets 24:. To operate the said pin, I provide a lever 28 on oneend thereof, by means of which the person using the tool can revolve thepin 23 to a position where its flattened ends will allow the notches 27and it to be raised and the gear 21 disengaged from the teeth of therack-bar. (See Figs. 4 and 5.)

The following is a description of the manner of using my improved tool:Having set the depth and width gages to make the desired cut andadjusted the tool on the wood with the gages pressing firmly thereon,the person using the tool will strike the post 7 a blow with a hammer ormallet, forcing the knife 5 into the wood in line with its grain to makethe cut for the inner side of the mortise. The endknives 11 are thendriven into the Wood across the grain, and this having been done thelever 22 is operated to press the horizontally-operating knife 18 intothe wood and cut out the chip to complete the mortise. Whenever desired,the length of the mortises can be varied by the simple adjustment of theend knives toward or from each other and the substitution of ahorizontal knife having a cutting edge of suitable length.

I claim as my invention- 1. A mortismg-tool, comprising a stock or head,a side knife fixed therein, a series of vertically-arranged knife-guidesprovided in said head, end knives slidably arranged in said guides andadapted to be driven, suitable depth and width gages, and ahorizontallyoperating knife for removing the chip slidably mounted insaid head, and means for operating said knife.

2. A mortising-tool comprising a stock or head and side knives fixedtherein, a plurality of. vertically arranged knife guides in said head,end knives slidably arranged in said guides and adapted to be driven,and a hori- Zontally-operating knife slidably mounted in said head, andmeans for operating said knife.

3. In a hinge-mortising tool, the combination, with a foot or bracket,of a knife slidably mounted therein, a rack-bar provided on said knife,a lever having teeth to engage said rack-bar, a pin having flattenedends \vhei'eon said lever is mounted, bearings for said pin on saidbracket, said bearings having notches to receive said flattened endswhen said pin is revolved to a certain predetermined position, and meansfor revolving said pin.

In witness whereof I have hereunto set my hand this 8th day of August,1903.

JAMES A. MACKENZIE.

In presence of RICHARD PAUL, S. V. GRIFFIN.

